Siemens AVR 6GA2 490-0A – Automatic Voltage Regulator

The Siemens AVR 6GA2 490-0A is a precision-engineered automatic voltage regulator designed for brushless generator sets (notably the 1FC4 and 1FC5 series). It controls the excitation current to ensure stable generator output voltage under varying load conditions, offering excellent performance and durability. 

Key Specifications & Features:

• Part Number: 6GA2 490-0A (also referenced as 6GA2490-0A) genspare.com+2atechipower.com+2

• Voltage regulation accuracy: up to ±0.5% under specified conditions. 

• Input sensing voltage: Single-phase or three-phase sensing options. 

• Frequency: 50/60 Hz. 

• Designed for use with Siemens 1FC4/1FC5 series generator sets. 

• Thyristor-based control for improved excitation performance and load handling.